Heating and hardening burner



Get. 10; 1950 v B. s. WARD, JR 2,525,055

HEATING AND HARDENING BURNER Filed April 2'7,- 1945 INVENTOR Bert 0ifqfiaf .111

' ATTORNEYS 4 I- IO Patented Oct. 10, 1953 UNITED STATES rAr Nr OFFICEBert G. Ward, Jr,

2 Claims.

This invention relates to blowpipes or burner apparatus of the typedesigned and adapted for producing a row of closely spaced hightemperature flames for the heat treatment of the surface of an article,as for instance in flame blasting and descaling operations to removescale, rust, or other adhering material therefrom, or to so alter saidmaterial that it may be easily removed mechanically.

In apparatus of this general type it is. common practice to secure theburner head intermediate of its ends to a handle extending at rightangles thereto, and through which handle the mixture of combustible andcombustion supporting gases is delivered to a passage disposed in andextending lengthwise of the burner head, and from which passage thereleads a row of branch passages to the row of gas outlets at which theflames are formed.

As the flames are small, the burner head when in use, is disposed quiteclose to the surface to be heated, and therefore when used continuouslyfor a long period, the head is liable to become heated to such an extentthat there is liability of injury to the head, or preignition of the gasmixture within the torch head. As one feature of my invention there isprovided a new and improved construction which facilitates the coolingof the head during the use thereof. I

In order toobtain uniform results on the surface being treated, it isdesirable that the burner outlets be kept at a substantially constantdistance from said surface as the burner moves over it. This is commonlyaccomplished by resting the side or edge of the burner on said surface,and with the flames projected from an adjacent side and at an angle tosaid surface. As the burner body is commonly formed of copper or othermetal or alloy which is much. softer than a. steel or iron platepresenting the surface to be treated, and as said surface is often quiterough, the sliding movement of the burner head over the rough hardsurface causes wear which materially shortens the life of the burner.

In order to reduce such wear, it has been proposed to provide the burnerhead with hard inserts along opposite sides thereof, but thesematerially increase the cost and often give trouble Chicago, Ill.,assignor to National Cylinder Gas Company,.Chicago, 111., a corporationof Delaware Application April 27, 1945, Serial No. 590,646

due to the fact that they have a different co- As a further importantfeature the burner body is provided with grooves or channels dis posedbetween adjacent gas outlet passages and substantially parallel thereto,and the guard member coacts with the burner body to close the outersides of these channels while leaving both ends open. Thus currents ofcooling air are induced through said passages and act to prevent theburner body from becoming heated to an objectionably high temperature.By forming the cooling passages as channels in the surface of the burnerbody, they may be readily and easily cut with a milling tool, andwithout the necessity for drilling the burner body or providing specialpiping for a cooling fluid.

Various other objects and advantages will be apparent from aconsideration of the specific embodiment shown in the drawing, or willbe hereinafter pointed out. Except to the extent defined in the claims,the details may be modified in various ways and to various degreeswithout departing from the scope of the invention and withoutsacrificing the main advantages obtained thereby.

In the accompanying drawing:

Fig. 1 is a perspective View of the burner with a portion only of thehandle thereof.

Fig. 2 is a side elevation of the burner body and guard, portionsthereof being shown in section.

Fig. 3 is a face view of the burner, and

Figs. 4 and 5 are sections on the lines 44 and 55 respectively of Fig.2.

In the construction illustrated there is provided a burner body I!)which is in general of rectangular form as to its longitudinal andtransverse sections. This maybe formed of copper or other suitablematerial, and has a longitudinal passage II which may be formed bydrilling a hole therethrough and then closing the opposite ends of thehole with plugs 52. The handle I3 is welded or otherwise secured to therear face I 4 of the burner body and communicates with the passage llintermediate of the ends of the latter.

The combustible and combustion supporting gases which are ordinarilyacetylene and oxygen, may be delivered from suitable valve controlledpipes to a mixer at the outer end of the handle. As these featuresconstitute no part of the present invention they have not beenillustrated. The burner body is provided with a row of small dischargepassages 15 leading from the manifold passage II to the front face l6which is opposit to the rear face 14. Thus the mixture of gases 3delivered through the handle l3 and the manifold passage ll, flowsthrough all of the passages l5 and forms a row of small high temperatureflames at the outlets of the passages l5.

In order to facilitate cooling of the burner, the burner body isprovided with a series of transverse slots ll extending in from thefront face it for a considerable distance. These slots may, if desired,be arranged alternately with the discharge passages l5, but preferablythey are arranged between each alternate pair of passages, so that therewill be two passages [5 between each two of the slots IT. The side facesI8 and it of the burner body are provided with channel or groovesopposite to each of the slots [1, and the channels are preferablysubstantially V-shaped, and may be tapered so that at their upper endsthey merge into the side faces of the burner, and with the smaller orpointed upper ends of the grooves slightly above the inner ends of theslots ll. As is shown, these grooves extend rearwardly from the burnerface for a substantial distance.

Secured to the burner bod are a pair of plates 2| and 22, each of whichmay have one edge substantially in t -e plane of the face E6 of theburner body, or may extend slightly therebeyond. The opposite edge ofeach of the plates 2| and 22 is spaced at some distance below the upperends of the channels 20 and the slots ll. In other words, the width ofeach plate is somewhat less than the length of the channels. The platesmay have lugs or extensions 23 at the ends thereof, and if desired, at afew intermediate poin'ts, and by means of which the plates ma be securedto the burner body by screws, rivets or pins 24. Preferabl the twoplates 2i and 22 are made from a single piece of metal which may extendall the way around the burner body and across the ends of it as well asacross the sides. These plates are of very much harder material than theburner body, so that when the burner is held in an inclined position inrespect to a hard rough surface to be treated, for instance as shown inFig. 1, the edge of one plate will bear on said surface and will preventthe burner body from being worn away by repeated movement over saidsurface. These plates, if they become worn or warped, may be readilyremoved and replaced b new ones by merely removing the screws, rivets orpins 2 3.

The plates in my improved construction serve a double function, in thatthe not only protect the burner body from. wear, but they also engagethe faces i8 and [9 between adjacent channels so as to form the outerwall of passages which are open at their upper and lower ends. In theuse of the burner, the flames projected from the outlet ends of thedischarge passages it will induce air currents through the channels 20from the upper ends of the latter to the lower ends, and thisautomatically induced air circulation through the channels will keep theburner body reasonabl cool and prevent such overheating as might injurethe burner or cause preignition in the passages thereof.

The channels and the slots coact to subdivide the lower portion of theburner body into a series of relatively small nozzles between which airmay circulate to insure proper cooling. By forming the slots and thechannels by simple machining operation, it is not necessary to do anydrilling of the burner body other than to provide the manifold passageII, the discharge passages l5, and the openings for the plate attachingelements 24.

I have referred to the forming of the nozzle by the cutting of the slotsand the milling of the channels. It will of course be obvious that it isis not essential that there be two such separate cutting operations, asthe channels may be cut sufiiciently deep so that they intersect, andtherefore the separate forming of the slots I! is not necessary.

As previously indicated, the channels or air passages are so spaced thatthere are two gas outlet passages between successive channels. Obviouslythere might be a lesser number of such channels, or there might be aseparate channel between each two gas passages.

The lugs may be omitted from the plates if desired, and the plates beheld in place only by attaching members at the ends of the burner body.The plates with their connecting end portions may be considered as asleeve telescoped onto the burner body. The side plates serve to protectthe air channels of the burner body from becoming clogged or filled withmaterial detached from and thrown up from the surfaces being treated. Incase any clogging or filling of the channels occurs, it will be obviousthat they may be readily cleaned out by brushes applied to the channelsand thin blades projected through the slots.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. A flame blasting or descaling burner for producing a plurality ofhigh temperature heating flames, including an elongated metal bodyhaving a single manifold passage extending lengthwise thereof, a supplypassage leading into said manifold passage for delivering a combustiblegas mixture thereto, a row of branch passages leading from said manifoldpassage to outlets in the face of the burner body to discharge aplurality of spaced streams of said combustible gas mixture to form aplurality of high temperature heating flames, said body having also aplurality of grooves formed in opposite sides thereof, located betweenpairs of said branch passages, substantially parallel thereto andextending rearwardly for a substantial distance from said face of theburner, and plates extending lengthwise of said burner secured theretoon opposite sides thereof and covering only a portion of the length ofsaid grooves adjacent to the said face of the burner and defining withsaid grooves open-ended passages terminating at said face adjacent toand between pairs of said outlets for said combustible gas mixture.

2. A flame blasting or descaling burner for producing a plurality ofhigh temperature heating flames, including an elongated metal bodyhaving a single manifold passage extending lengthwise thereof, a supplypassage leading into said manifold passage for delivering a combustiblegas mixture thereto, a row of branch passages leading from said manifoldpassage to outlets in the face of the burner body to discharge aplurality of spaced streams of said combustible gas mixture to form aplurality of high temperature heating flames, said body having also aplurality of grooves formed in opposite sides thereof, located betweenpairs of said branch passages, substantially parallel thereto andextending rearwardly for a substantial distance from said face of theburner, said grooves in opposite sides of said burner being connected inpairs by slots extending for a substantial distance from said faceof theburner, and plates extending lengthsides thereof and covering only aportion of the wise of said burner secured thereto on opposite UNITEDSTATES PATENTS Number Name 7 Da length of said grooves and slotsadjacent to the 804 002 Fouche J NOV said face of the burner anddefining with said a 1 Stephens}; g, 1933 grooves and slots open-endedpassages terminat- 5 1942352 Anderson Jan 1934 ing at said face adjacentto and between pairs of 1957587 Hager said outlets for said combustiblegas mixture. 2356196 g QE'IIIZ' 1944 BERT WARD 2,356,197 Jones Aug. 22,1944 REFERENCES CITED 10 i FOREIGN PATENTS The following references areof record in the Number Country Date file of this patent: 198,801

Great Britain Mar. 14, 1922

